Resetting-circuit for annunciators.



J. 0. GADIEUX.

RESETTING CIRCUIT FOR ANNUNGIATORS.

APPLICATION FILED NOV. 7, 1912.

Patented Dec. 9, 1913.

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ltpeciacatlon or ltettcra Patent.

Patentedit, this. tlcrial ll'o, 729,953.

application filed .ttovemher To all whom it may concern:

Be it known that l, dosnrn ll. @aninmr, a citizen ot the llnited States, residing at ltleriden, New Haven county, and State oi tlonnecticut, haveinvented certain new and useful improvements in Resetting-Circuits tor Annunciators, of which the following is a lull, clear, and exact description.

This invention relates to electric annunciators employing visual indicators and a call hell or other sound device, and is more especially designed to provide means tor resetting any one or more ot the indicators which have been moved trout normal position by a call, this resetting operation being etlected with a minimurn expenditure at current. These and other advantages will be described in detail in the accompanying specification and are illustrated in the no cornpanying drawing forming part thereot and illustrating diagrammatically the application oil my invention to a threodrop electric annunciator.

Referring to the drawing by numerals, It

' indicates an electric battery or other source electric current, and 2 a bus bar which in practice is usually positioned on the annunciator case, there being a suitable connection 3 trorn one side or this battery to the bus bar.

4t-5, t3-'l, and 89, denote a series oit groups or pairs of complemental electromagnets, each pair comprising what l shall term a call magnet and a resetting magnet, the coils ot' these magnets being designated respectively by at, 5, ti, 1', 8, 9 @otiperat ing with these three pairs at electro-niagnets are the three pivoted arinatures l0, ll and lit. tlne end ot" the coils e, 6' and 8 ct eleetro-inagnets t, 6 and 8 which term the call magnets, are each connected at it to the bus bar 2 and through it to the battery l, while the other ends ct said coils are each coected by wires to a series of three call buttons 16, it and 18, one for each of the call magnets. 'llhe contacts 19 for each lot these cal buttons an all connected with wire 20 which in tunnts connected to one terminal or the alarm 2t. The other terininot of this alarm 21 is connected tot-he wire d2, one end of which connects with the opposite side ot the battery troni wire 3 and the other end of which wire 22 is connected to a reset button A contact 24 tor this reset button is provided, which contact is connectterrnediate its ends.

ed with a wire branches 26 each connecting respectively with one end of the coils 5, 7 and 9* of the electro-rnagnets 5, l and 9 forming the resetting magnets. the other ends of these coils are each connected to contacts 27 ositioned to be engaged by contact but-tons 28 carried by the armatures 10, 11 and 12. lhese"arrnatures areeach in turn electrically connected to the bus bar 2 by wires 33. Each of these armatures carries aslotted arm 29 within which rides lower end of an indicator arm 31 pivoted in- Each of these arms 31 carries 'at its upper end, an indicator disk 32 which is normally away from in front of an indicator opening in the annunciator case (indicated in dotted lines inthe drawing) and, when its call button is energized, is meted out in l ront ct said opening to indicate that the room or person designated by said opening, has called. it do not desire to be limited to any specific torin ot indicator arm but am merely showing one simple and el'l'ective itorm ol indicator as illustrative of the application ot" the invention.

l/Vith the foregoing in nind, the operation 'ot' the annunciator circuits is as tollows: Assuming that all signal arms are in normal position, as shown in the drawing by the signal arms 31 controlled through the armatures l0 and 11, the circuit closer formed by the button 18 and contact 19 is actuated to close the circuit. Current then flows from the battery through connecting wire 3, bus bar 2, electro-rnagnet coil 8 through its connection It with said bus bar, wire 15 to the contact 18, then through contact 19, wire 20, alarm 21, and wire 22 to the battery, thereby clos ing the circuit, sounding the alarm and energizing electric-magnet 8 to pull its armature 12 down to the position shown in the drawing, this movement of the armature, moving its signal dish 32 out in heat of the opening inthe annunciator. The mere weight of this signal arm being thrown to the right, will, through its end hold the armature 12 to the position shown until reset by thetollowing means: When the armature 12 has been moved down to the po sition shown in the drawing, its contact button 28 engages its contact 27, these parts learning in ett'ect a mechanically controlled 25 provided with three t thereby attracting its armature and moving its indicator into calling position, an interrupted resetting circuit through each reset magnet, means whereby the attraction of an armature to its call'magnet closes a break in a resetting circuit to prepare it for operation, and a single resetting circuit closer in common to at least two resetting circuits and adapted to energize the reset circuit closer for the reset magnet circuit. If it is desired to reset this armature 12 and restore the indicator disk to its non-indicating position, the reset button 23 is moved to close the circuit through contact 24. \Vhen' this is done, the circuit closed is as follows: from the battery through wire 3, bus liar '2. connection 33 to armature 12,-thence to contact button .28, through magnets of only such resetting circuits as contact 21', electro-magnet coil 9, branch have been prepared for operation by the wire 26, wire 25, thence through contact 24, attraction of the armatures to the call magreset. button wire 92 and back to the nets, to thereby attract the armatures thereof and reset their indicators.

, 2. In a device of the character described, in combination, a plurality of groups of electro-magnets, each group embodying a calling magnet and a reset magnet, an armature for each magnet group, an indicator movable into two tell-tale positions by the movements of its armature, a source of electric current, normally open electric circuits through said call magnets and current circuit closer for each call circuit adapted to close its certain circuit The closing of the 'circuit will the electro-magnet 9 and 12 down to contact with. the core ofelec-tro-magnet 9 thereby throwing the indicator arm 31 and its disk 32 back to its normal non-indicating position as illustrated by the indicator arms controlled through armatures 10 and 11 in the drawing.

battery. therefore energlze The armature 12 Wlll remain in this reset position until its controlling call button again closes the circuit in the manner described. ,It will be seen that the calling and resetting circuits overlap to some slight extent in that they use a common conductor for part of their respective circuits. This not only tends to simplicity in structure and in construction but is productive of substantial economies.

I have described the calling and resetting operation only of one air of electro-magnets as the circuits in t 1e case of all groups are similar and need no further specific description. It is important to note that when the reset button 23 is moved to close the resetting circuit or circuits, current will flow only through those reset magnets whose circuits have been closed by the attraction of their armatures to their call magnets. The current therefore will flow only through the coils of those magnets which must be energized to reset an indicator arm; consequently, a minimum of electric current is expended in the resetting operation.

While I have herein described a specific embodiment of my invention, I desire it understood that various modifications thereof are pos ible within the spirit of the invention and the scope of the appended claims.

What I claim is 2- 1. In a device of the character described, in combination, a plurality of groups of electro-magnets, each group embodying a calling magnet and a reset magnet, an armature for each magnet group, an indicator movable into two tell-tale positions by the movements of its armature, a source of electric current, normally open electric circuits through said call magnets and current source, a call circuit closer for each call circuit adapted to close its certain circuit to energize the call magnet thereof,

by attracting its armature and moving lts indicator into calling position, an interrupted resetting circuit through each reset magnet, said call and reset circuits having a portion of their circuits overlapping by means of a conducting member in common thereto, means whereby the attraction of an armature to its call magnet closes a break in a resetting circuit to prepare it for operation, and a single resetting circuit closer in common to at least two resetting circuits and adapted to energize the reset magnets of only" such resetting circuits as have been prepared for operation, to thereby attract the armatures thereof and reset their indicators.

3. In a device of the character described, in'combination, a plurality of groups of electromagnets, each group embodying a call magnet and a reset magnet, a pivoted armature for .each magnet group, an indicator controlled by each armature having two tell-tale positions and moved from one to the other of said positions by the movement of its armature, a source of electric current, abus bar, a connection between said current source and" said bus bar, a connec-. tion between said bus bar and the call magnet of each group, a circuit closer for each call magnet in connection therewith and with said gurrent source whereby each call magnet may be energized to attract its armature thereto and move its indicator, a connection between said bus bar and each armature, a resetting circuit closer, a connection between said resetting circuit closer and said current source, a connection between said resetting circuit closer and each reset magnet and its armature, closed only when said armature is moved by the energizing of its call magnet, whereby, when said resetting circuit closer is operated, current flows only through such reset magnets whose connections have been closed by the movement of their armatures, and attracts said armatures thereto to more the indicators controlled thereby into their first posilion.

4:. In a device of the character described, in combination, a plurality of groups of electro-n'iagnets, each group embodying a call magnet and a reset magnet, a pivoted armature for each magnet group,; an indicator controlled by each armature having two tell-tale positions and mored from one to the other of said positions by the movement of its armature, a source of electric current, a bus bar, a connection between said current source and said bus bar, a connection between said bus bar and the call magnet of each group, a circuit closer for each call magnet in connection therewith and with said current source whereby each call magnet may be energized to attract its armature thereto and move its indicator, a connection between said bus bar and each armature, a resetting circuit closer, a connection between said resetting circuit closer and said current source, a connection be tween each reset magnet and its armature closed by said armature when its armature is moved by the energizing of its call magnet whereby each resetting circuit is closed atone point only when its call magnet has been energized, and whereby, when said resetting circuit closer is operated, current flows only through such reset magnetsas have been so closed by the movement of their armatures, and attracts said armatures thereto to move the indicators controlled thereby into their first position.

In a device of the character described, a plurality of signal controlling armatures, a calling elect-ro-magnet and a complemental resetting electro-magnet for controlling each of said armaturcs, each calling magnet being arranged to shift its armature to sig naling position and its complemental resetting magnet being arranged to shift said armature to a min-signaling position, a source of electric current, a circuit therefrom having branches leading through each of the calling magnets, each branch includ ing a manually operable circuit closer, another circuit from said current source, said last mentioned circuit having interrupted branch circuits leading through the resetting magnets of each set, each of said branch circuits being closed by its respective armature through its call magnet, and a single resetting circuit closer in common to at least two resetting branches of said resetting circuit.

6. In a device of the character described, a plurality of signal controlling armatures, a calling elect-ro-magnet and a comple1nental resetting electro-magnet for controlling each of said armatures, each calling magnet being arranged to shift its armature to signaling position and its complcmental resetting magnet being arranged to shift said armature to a non-signaling position, a source of electric current, a circuit tl1erefrom having branches leading through each of the calling magnets, each branch including a manually operable circuit closer, an other circuit from said current source, said last mentioned circuit overlapping the first circuit in part and having interrupted branch circuits leading through the resetting magnets of each set, each of said. branch circuits being closed by the movement of its respective armature through its call magnet, and a single resetting circuit closer in common to at least two resetting branches of said resetting circuit.

JOSEPH O. CADIEUX. lVitnesses:

L. T. FULLER, G. H. DU'r'rON. 

